RCTA INDICATOR LIGHT FLASHES WHILE NOT UNDER RCTA INDICATOR LIGHT-FLASHING CONDITIONS [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE]

id0903n2018800

Description

RCTA indicator light flashes under conditions other than flashing conditions

•  The RCTA indicator light flashes under conditions other than the RCTA indicator light flashing conditions (R position), and target vehicle detection).

Possible Causes

•  BSM control module mis-detects another vehicle or mis-estimates the time that another vehicle will reach the detection line

―  Deviation of radar emission direction in BSM control module (emits radar outside of blind spot, or to adjacent lane)

•  Damage, deformity or looseness of vehicle frame (including moderate impacts)

•  Incorrect installation of rear bumper, dirt on radar emitting/receiving area, application of stickers (including transparent types), repairs using putty application

―  Effect of non-genuine, after-market electronic device installation

Note

•  If there is a thick moisture film (such as condensation) on the rear bumper, the BSM control module may not receive echo-back correctly.

•  The BSM control module may not receive echo-back correctly due to the negative effect of a non-genuine bumper or paint, or installation of after-market parts.

•  RCTA indicator light flash circuit malfunction

―  Audio unit (with color LCD display) internal malfunction (RCTA indicator light flash circuit malfunction)

―  BSM control module (LH) internal malfunction (RCTA indicator light flash circuit malfunction)

―  BSM control module (LH) malfunction (mistaken flash request output)

Diagnostic Procedure

Step	Inspection		Action
1	DETERMINE IF MALFUNCTION CAUSE IS RCTA INDICATOR LIGHT • Verify the flash of the BSM indicator light. • When the RCTA indicator light flashes, does the BSM indicator light also flash?	Yes	Go to the symptom troubleshooting BSM INDICATOR LIGHT ILLUMINATES WHILE NOT UNDER LIGHT-ILLUMINATION CONDITIONS. (See BSM INDICATOR LIGHT DOES NOT ILLUMINATE WHILE UNDER BSM INDICATOR LIGHT-ILLUMINATION CONDITIONS [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].)
1		No	Go to the next step.
2	VERIFY RCTA INDICATOR LIGHT FLASH CIRCUIT SYSTEM • Turn the following BSM active command items on and off using the M-MDS active command. (See ACTIVE COMMAND MODES INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].) ― RCTA_WARN • Is the RCTA indicator light illuminated/turned off?	Yes	Go to the next step.
2		No	Replace the BSM control module. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].)
3	INSPECT AUDIO UNIT • Perform the audio unit DTC inspection. (See DTC INSPECTION [AUDIO].) • Are any DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [AUDIO].)
3		No	Go to the next step.
4	INSPECT BSM CONTROL MODULE • Inspect the BSM control module on the side that is malfunctioning. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].) • Is the BSM control module normal?	Yes	The possibility that the BSM control module was temporarily unable to receive echo-back correctly can be considered. If the same symptom recurs repeatedly, replace the BSM control module. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].)
4		No	Replace the BSM control module. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].)